syzbot


kernel BUG in bch2_journal_replay (2)

Status: upstream: reported C repro on 2025/01/11 09:13
Subsystems: bcachefs
[Documentation on labels]
Reported-by: syzbot+a3885f6d294f83923567@syzkaller.appspotmail.com
First crash: 37d, last: 26d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [bcachefs?] kernel BUG in bch2_journal_replay (2) 0 (2) 2025/01/18 06:02
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in bch2_journal_replay bcachefs C done 3 176d 248d 28/28 fixed on 2024/10/03 15:25
Last patch testing requests (1)
Created Duration User Patch Repo Result
2025/02/01 06:22 19m retest repro upstream OK log

Sample crash report:
    new u64s 5 type deleted 14293651161087:U64_MAX:U32_MAX len 0 ver 0
bcachefs (loop0): bch2_btree_update_start(): error EIO
bcachefs (loop0): bch2_btree_update_start(): error EIO
------------[ cut here ]------------
kernel BUG at fs/bcachefs/recovery.c:130!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5306 Comm: syz-executor276 Not tainted 6.13.0-rc7-syzkaller-00160-gad26fc09dabf #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:replay_now_at fs/bcachefs/recovery.c:130 [inline]
RIP: 0010:bch2_journal_replay+0x2a09/0x2a40 fs/bcachefs/recovery.c:346
Code: cd 35 7e 07 e8 68 9e 54 fd 90 0f 0b e8 60 9e 54 fd 90 0f 0b e8 58 9e 54 fd 90 0f 0b e8 50 9e 54 fd 90 0f 0b e8 48 9e 54 fd 90 <0f> 0b e8 40 9e 54 fd 90 0f 0b e8 38 9e 54 fd 90 0f 0b e8 30 9e 54
RSP: 0018:ffffc9000d297180 EFLAGS: 00010293
RAX: ffffffff844ae428 RBX: ff0000000000000b RCX: ffff88801f6b0000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ff0000000000000b
RBP: ffffc9000d297478 R08: ffffffff844ad999 R09: ffffffff84beba5f
R10: 0000000000000004 R11: ffff88801f6b0000 R12: ffff888044a4abb8
R13: dffffc0000000000 R14: 00000000ffffffff R15: ffff888044a4abc0
FS:  000055555a053380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055fd59292098 CR3: 0000000043c6e000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_run_recovery_pass+0xf0/0x1e0 fs/bcachefs/recovery_passes.c:191
 bch2_run_recovery_passes+0x3a7/0x880 fs/bcachefs/recovery_passes.c:244
 bch2_fs_recovery+0x25cc/0x39d0 fs/bcachefs/recovery.c:861
 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1037
 bch2_fs_get_tree+0xd68/0x1710 fs/bcachefs/fs.c:2170
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3511
 do_mount fs/namespace.c:3851 [inline]
 __do_sys_mount fs/namespace.c:4061 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4038
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1e71c47dfa
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffde82bfb88 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffde82bfba0 RCX: 00007f1e71c47dfa
RDX: 00000000200058c0 RSI: 0000000020000140 RDI: 00007ffde82bfba0
RBP: 0000000000004800 R08: 00007ffde82bfbe0 R09: 0000000000005a2b
R10: 0000000000004800 R11: 0000000000000282 R12: 0000000000000005
R13: 00007ffde82bfbe0 R14: 0000000000000004 R15: 0000000001000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:replay_now_at fs/bcachefs/recovery.c:130 [inline]
RIP: 0010:bch2_journal_replay+0x2a09/0x2a40 fs/bcachefs/recovery.c:346
Code: cd 35 7e 07 e8 68 9e 54 fd 90 0f 0b e8 60 9e 54 fd 90 0f 0b e8 58 9e 54 fd 90 0f 0b e8 50 9e 54 fd 90 0f 0b e8 48 9e 54 fd 90 <0f> 0b e8 40 9e 54 fd 90 0f 0b e8 38 9e 54 fd 90 0f 0b e8 30 9e 54
RSP: 0018:ffffc9000d297180 EFLAGS: 00010293
RAX: ffffffff844ae428 RBX: ff0000000000000b RCX: ffff88801f6b0000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ff0000000000000b
RBP: ffffc9000d297478 R08: ffffffff844ad999 R09: ffffffff84beba5f
R10: 0000000000000004 R11: ffff88801f6b0000 R12: ffff888044a4abb8
R13: dffffc0000000000 R14: 00000000ffffffff R15: ffff888044a4abc0
FS:  000055555a053380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055fd59292098 CR3: 0000000043c6e000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/01/18 06:02 upstream ad26fc09dabf f2cb035c .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root kernel BUG in bch2_journal_replay
2025/01/18 05:48 upstream ad26fc09dabf f2cb035c .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in bch2_journal_replay
2025/01/07 09:11 upstream fbfd64d25c7a f3558dbf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in bch2_journal_replay
* Struck through repros no longer work on HEAD.